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Hex Bolts Manufacturers. Buy Top Quality Stainless Steel & Special Alloy Hex Bolts at Best Prices!

Hex Bolts


Hex Bolts Manufacturers & Suppliers in India – Buy Top Quality Hex Head Bolts

A hex bolt is a fully threaded or partially threaded bolt with a hex head.

  • DIN 931 – Hexagon Cap Screws Partially Threaded or Partially Threaded Hex Bolts
  • DIN 933 – Hexagon Cap Screws Fully Threaded or Fully Threaded Hex Bolts

Metline specializes in the manufacture of hex bolts as per ASTM A193, ASTM A320, ASTM A325, ASTM A307B, and ASTM A490. We offer hex bolts in materials such as ASTM A193 Grade B8M, Inconel, Monel, Titanium and Other Special Alloys. We provide hex bolts as per DIN Standard 931 & DIN Standard 933.

  1. GRADE: SS 304
  2. GRADE SS 316
  3. HIGH TENSILE Gr. 8.8 / Gr. 10.9
  4. MILD STEEL Gr. 4.6 / Gr. 5.6

Hex bolts (six sided heads) are the industry standard for fasteners with forged heads. ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head. However, for specifications such as A307 Grade B, A325 and A490 require a heavy hex pattern.

Our regular hexagon head cap bolts and production range includes size 1/2” to 3″ diameter. We can also offer custom sizes, as per requirements from our customers. We manufacture hex bolts in Stainless Steels (ASTM A193), Alloy Steels, Carbon Steel (ASTM A307 Grade B) and Structural Steels (ASTM A325 & A490). ASTM A193 heavy hex bolts are manufactured for use in high heat conditions, while ASTM A320 standard covers extremely low temperature conditions.

Heavy hex bolts are generally used in high temperature or high pressure applications as well as bridges, highway, buildings and other construction projects. Hex bolts are available in Plain, Zinc Plated, Hot Dipped Galvanized, Black Oxide, Silicone Bronze, Yellow Zinc, Aluminum, SS 316, and SS 304.

Additional information


Hex bolts have hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.

Manufacturing Standards

ASTM 193, ASTM 320, ASTM 325, ASTM 490, ASTM 307, ISO:898 / IS-1367

ASTM 193

B5, B6,B7, B7M, B16
B8M CLASS 1 & 2
B8 CLASS 1 & 2
B8C, B8T

ASTM 320

L7, L7A, L7B, L7C, L43
B8 CLASS 1 & 2B8M CLASS 1 & 2
B8F, B8T

ASTM 325

TYPE – 1, 2, 3

ASTM 490

TYPE – 1, 2, 3

ASTM 307

GR – A, B

ISO:898 / IS-1367

GR – 4.6, 5.6, 8.8, 10.9, 12. 9

Diameter Size

M02 to M160


30 mm to 2000 mm, Custom Lengths


Mild Steel, Stainless Steel, Carbon Steel, Alloy Steel, Brass, Copper, Duplex & Super Duplex Nuts, Aluminium, Hastelloy, Incoloy, Inconel, Monel.

Surface Finish

Blackening, Cadmium Zinc plated, Galvanized, Hot Dip Galvanized, Nickel Plated, Buffing


Metric, BSW, BSF, UNC, UNF, and as per costumers requirement

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